[RFC PATCH 2/4] objtool: Enable objtool to run only on files with ftrace enabled

[Sathvika Vasireddy]

Hi Christophe,

On 24/05/22 14:27, Christophe Leroy wrote:
>
> Le 23/05/2022 à 19:55, Sathvika Vasireddy a écrit :
>> This patch makes sure objtool runs only on the object files
>> that have ftrace enabled, instead of running on all the object
>> files.
> Why do that ?
This was done to address the issue discussed here:
https://lore.kernel.org/all/b06bb9bc-22d1-acce-fe68-c7c4cb7c15b5@csgroup.eu/ 

>
> What about static_calls ? There may be files without ftrace but with
> static calls.
Yes, this prevents objtool from running on those files. We can
restrict this change to FTRACE_MCOUNT_USE_OBJTOOL
>
> By the way, it would be nice if we could use it only on C files.
> I get the following errors for ASM files:
>
> arch/powerpc/kernel/entry_32.o: warning: objtool: .text+0x1b4:
> unannotated intra-function call

I'm looking into ways to address this.

- Sathvika